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Finding the Fourth Proportional to 612,461.70, 918,692.55 and 346,741.20

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Solution

The fourth proportional to 612,461.70, 918,692.55 and 346,741.20 is: 520,111.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,461.70 : 918,692.55 = 346,741.20 : x
  2. Step 2: Convert to fraction form
    612,461.70/918,692.55 = 346,741.20/x
  3. Step 3: Cross multiply
    612,461.70x = 918,692.55 × 346,741.20
  4. Step 4: Simplify right side
    612,461.70x = 318,548,557,218.06
  5. Step 5: Solve for x
    x = 318,548,557,218.06/612,461.70
  6. Step 6: Final answer
    x = 520,111.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.